CELZANOPSIS.—PACHYLALAPS. 37 
strong bristle, ‘The labial horns are long and slightly curved, in the shape of the 
letter § reversed ; between their bases and the hypostome there is another process, the 
top of which forms an acutely-pointed transparent foliole or spatula; the hypostome 
ends in a long and narrow tongue-like process. 
Two specimens. 
. PACHYL/AELAPS. 
Pachylelaps, Berlese, Acari, Myr., et Scorp. Ital. fasc. li. no. 10 (1888). 
1. Pachylelaps heros, 
Pachylelaps heros, Berlese, Bull. Soc. Ent. Ital. xx. p. 196, t. 8. figg. 2, 2 a-e. 
Var. mexicanus. (Tab. XIX. figg. 2, 2 a-e.) 
3. Corpus late ovatum, supra convexulum, antice subangulatum, postice rotundatum, antice et postice decli- 
yum. Color scutorum, rostri pedumque badius, membranarum conjunctivarum albicans. Scutum dorsuale 
integrum, fere nudum, dense reticulatum, setis sparsis in parte anteriore et in marginibus munitum, a 
margine postico membrana conjunctiva setulas numerosas gerente separatum. Pedes primi paris graciles, 
articulis plus minusve cylindricis, setis sparsis munitis, tarsis unguiferis. Pedes secundi paris crassissimi, 
dentibus seu calcaribus ut sequitur armati; dentes breves duo in coxée apice adsunt, trochanter est 
inermis, femur calcari fusco, recto, indistincte tridentato armatum, genu atque tibia tuberculum parvum 
bigibbosum gerunt, tarsus ante apicem dentem fortem obtusum preebet. Coxee tertii paris dentibus duobus, 
uno centrali, altero marginali, brevibus munite, trochanteres ad apicem dentes duos juxtapositos desupra, 
tertium infra ferunt, ceteri articuli pilis exceptis inermes. Coxee quarti paris dentibus duobus brevibus sicut 
in tertio pari munits, trochanteres ad apicem desupra dentes duos subacutos juxtapositos, infra dentem 
unum obtusum gerunt, femur ad basin et in apice dente armatum, ceteri articuli, tarsis inermibus exceptis, 
dentibus duobus armati. Scutum sternale cum ventrali concretum reticulatum, postice truncato-rotun- 
datum, marginem posticum non attingens, ab anali separatum. Scuta metapodica parva, trigona angulis. 
rotundatis. Scutum anale parvum, trigonum. Orificlum genitale parvum in margine anteriore scuti 
ventralis situm. Inter scutum ventrale et hypostoma lobulus parvus lingueformis, setulis duabus ad 
apicem munitus mobilis insertus est. Chele mandibularum modice, dentibus paucis armatz, in brachio 
mobili processus longus ad chele basin in spiram pluries convolutus insertus est. Corniculi labiales dis- 
tincte biarticulati, eorum articulus postremus ante apicem dentem parvum gerit. Palpi inermes, excepto 
articulo primo inferne calcar robustum ferente. 
2. Statura et colore maris; a mare precipue differt pedum pari secundo ceteris haud crassiore, inermi, nec non 
quarto pari calearibus carente, inermi. 
Long. 2 millim.; lat. 1-5 millim. 
Hab. Mexico, San Andres 'Tuxtla (Sad/é). 
Body of the male broadly ovate, slightly convex, its anterior border forming a short 
acute angle; colour of the hard plates, the rostrum, and legs light reddish-brown, the 
connecting membranes whitish; the dorsal plate almost hairless, bearing only a few 
bristles on its anterior and lateral borders; the bristles are longer and more thickly set 
on the whitish membrane which connects the dorsal plate to the ventral pieces; the 
dorsal plate shows a minute reticulation, consisting of a network of small polygonal 
are; almost on the middle of the dorsal surface there are two slightly impressed 
grooves. The first pair of legs are slender, their joints almost cylindrical, bearing some 
